this post was submitted on 30 Apr 2024
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Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.

As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades: Graph of temperature as observed with significant warming, and simulated without added greenhouse gases and other anthropogentic changes, which shows no significant warming

How much each change to the atmosphere has warmed the world: IPCC AR6 Figure 2 - Thee bar charts: first chart: how much each gas has warmed the world. About 1C of total warming. Second chart: about 1.5C of total warming from well-mixed greenhouse gases, offset by 0.4C of cooling from aerosols and negligible influence from changes to solar output, volcanoes, and internal variability. Third chart: about 1.25C of warming from CO2, 0.5C from methane, and a bunch more in small quantities from other gases. About 0.5C of cooling with large error bars from SO2.

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Water Heaters Use Lots of Energy. The D.O.E. Wants to Change That. The Biden administration is tightening efficiency rules for water heaters, stoves and other appliances (www.nytimes.com)
submitted 6 months ago* (last edited 6 months ago) by [email protected] to c/[email protected]
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Washington Post coverage for comparison

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[–] [email protected] 9 points 6 months ago (3 children)

One note for anyone getting ready to switch to a heat pump water heater themselves: the fuckers are pretty loud. Make sure it's somewhere where the noise won't bother you when it's installed.

Newer models are getting quieter but the damn things are almost as loud as a small, modern window air conditioning unit when running.

Mine was installed right in the dead center of my house. Works great but I have to close several doors to not hear it at night (and I have it set up to mostly run overnight, though in someone else's situation it might be possible to have it run while everyone is out of the house at work or some such instead).

[–] [email protected] 9 points 6 months ago

Volume varies a lot by model. There are quieter ones.

[–] [email protected] 3 points 6 months ago

That's not my experience living here in Japan with one. Might be different makers/standards/requirements per country, though.